EP1194609B1 - Procede et moyens de production de forets - Google Patents

Procede et moyens de production de forets Download PDF

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Publication number
EP1194609B1
EP1194609B1 EP00946099A EP00946099A EP1194609B1 EP 1194609 B1 EP1194609 B1 EP 1194609B1 EP 00946099 A EP00946099 A EP 00946099A EP 00946099 A EP00946099 A EP 00946099A EP 1194609 B1 EP1194609 B1 EP 1194609B1
Authority
EP
European Patent Office
Prior art keywords
holder
drills
wall
tips
interior
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00946099A
Other languages
German (de)
English (en)
Other versions
EP1194609A1 (fr
Inventor
Richard Mark Lill
Alan Stevenson
John Dick
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dormer Pramet Ltd
Original Assignee
Dormer Tools Sheffield Ltd
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Publication date
Application filed by Dormer Tools Sheffield Ltd filed Critical Dormer Tools Sheffield Ltd
Publication of EP1194609A1 publication Critical patent/EP1194609A1/fr
Application granted granted Critical
Publication of EP1194609B1 publication Critical patent/EP1194609B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/04—Coating on selected surface areas, e.g. using masks
    • C23C14/042—Coating on selected surface areas, e.g. using masks using masks
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
    • C23C14/50—Substrate holders
    • C23C14/505—Substrate holders for rotation of the substrates

Definitions

  • This invention relates to the production of drills and in particular to the application of coatings, such as ceramic coatings, to drills.
  • Ceramic coatings are typically applied by physical vapour deposition (PVD) in a vacuum chamber, by such processes as evaporative arc or electron beam or sputtering, and the considerable cost of operating such equipment is a major factor, but there is little difference in process time with the length of the drill being coated.
  • PVD physical vapour deposition
  • US 4911784 discloses a holder loaded with drills arranged internally of the holder in herringbone fashion, the drills to be coated with a hard coating of titanium aluminium nitride.
  • a hollow holder for supporting a series of drills in a vapour deposition chamber to allow a ceramic coating to be deposited on regions of the drills expending from their tips, the holder comprising at least one perforated outer wall provided with an array of apertures into which the drills can be inserted, characterised by the drills are inserted with said regions projecting outwards from the holder, a support wall within the hollow interior of the holder for the or each perforated outer wall parallel with and spaced from the outer wall and provided with a corresponding array of apertures for locating the inserted drills with their shanks substantially parallel, stop means within the hollow interior of the holder spaced inwardly of the or each support wall for locating the tips of drills of the same diameter projecting to substantially the same
  • the stop means can be formed by a back wall in the interior of the holder, parallel to said outer wall and to said support wall.
  • the active zone of a PVD chamber is close to its inside wall.
  • the articles can be circulated along the periphery of the rotary path.
  • the holder may have a hexagonal outer periphery, alternate walls of said holder being perforated with an array of apertures into which the drills can be inserted.
  • the walls of the hollow holders according to the invention may be relatively thin to keep the thermal mass of the holders low, giving quicker heating and cooling at the beginning and end of the vapour deposition cycle, so as to reduce the cycle time. It is known to admit an inert gas into the chamber at the end of the cycle to increase the rate or cooling and preferably the holders are so arranged that the gas is allowed to circulate through the hollow interior of the holders also. However, the shanks of the drills must be shielded from the deposition material if they are not also to be coated, so the tops of the holders must be closed.
  • the holder is provided with a lid that shields the hollow interior from above, said lid being provided with a passage for facilitating the venting and cooling of said interior after application of the PVD coating.
  • a method of vapour-deposition coating the tips of a series of drills in which the drills are inserted in a hollow holder having a polygonal plan form with the tips to be coated projecting from at least one outer face of said polygonal form, the holder with the inserted tips being rotated in a vapour deposition chamber to allow each of the drill tips to project from the holder towards the periphery of the chamber for at least a part of the processing period, and a gas being allowed to circulate through the holder interior after deposition of the coating to assist cooling of the drills.
  • the holders shown in the drawings are designed to permit the tips of fluted high speed steel drills to be given a titanium nitride coating by PVD over about one quarter of the fluted length of the drills.
  • a single drill D is shown in phantom in Fig. 2, to illustrate how each drill is mounted in a holder with its tip projecting to be exposed to the coating vapour, the remainder of the drill shank being shielded by the holder.
  • the holder 2 of Figs. 1 to 3 has a hexagonal plan form and alternate outer side walls 4 are drilled with a rectangular array of apertures 6 over their walls and most of their height to receive a bank of drills.
  • the apertures are spaced to leave clearances between adjacent drills approximately equal to their diameter.
  • Each inner wall has a corresponding array of apertures (not shown) so that the inserted drills D are held parallel to each other.
  • the apertures of the inner wall are set slightly below those in the outer wall so that the drills can rest stably, inclined at an angle of about 2° from the horizontal.
  • back walls 10 which present planar abutment faces parallel to each outer wall, over the area of each array of apertures.
  • the back walls are connected to each other to give a stable sub-assembly which is attached to the outer walls only at three positions around the inner periphery of the outer walls 4.
  • the drills fit freely in the apertures 6 to allow them to be inserted and removed easily, but the clearance must be limited to minimise the spread of the coating material beyond the exposed tips. It is therefore required to provide different holders for different diameters of drill if a range of diameters are to be treated.
  • the number of apertures in each array will be reduced and their spacing increased as the drill size increases, and the depth of insertion must also be increased if the same proportion of the drill length is to be exposed. Beyond a certain size of drill, therefore, other changes are required.
  • Figs. 4 and 5 show a holder 22 of the same size and hexagonal plan form as that in the first example, but because it is intended for drills of significantly greater length and diameter, apertured outer walls 24 are provided only on one pair of diametrically opposite sides of the hexagon.
  • the drills are held in corresponding arrays of apertures 6 in the outer walls 24 and inner walls 26 and their depth of insertion is limited by the parallel back walls 28.
  • the inner and back walls are thus provided only on those two opposite sides.
  • the holders 2,22 of Figs. 1 to 5 are designed to be stacked to form a tower 30, as shown in Figs. 10 and 11, in order to utilize the height of the PVD chamber.
  • Each holder has a bottom skirt 32 stepped out from the outer side walls 4,24 so that one holder can be placed upon another, with a shoulder 34 at the inner face of the skirt resting on the top edge 36 of the outer wall of the lower holder, and the skirt 32 helping to block the ingress of the coating material into the tower.
  • a base unit 42 for the tower as shown in Figs. 6 and 7, has a platform 44 in which the bottom flange 32 of the lowermost holder is received, located around inner peripheral wall 46 and within outer peripheral wall 48, the walls 46,48 also helping to block any ingress of coating material.
  • the base unit has a central spigot 50 extending below the platform, provided with a socket 50a to allow the tower to be mounted on a rotary spindle as will be further described below.
  • the interior of the tower is closed by a lid 52, shown in Figs. 8 and 9, placed on the topmost holder 2,22.
  • the lid has an outer peripheral wall 54 which overlaps the holder outer walls 4 and from which a ring-form first cover plate 56 projects inwards, the lid resting on the holder top edge 36 by the cover plate 56.
  • a cylindrical collar 58 projects upwards from the cover plate 56.
  • a disc-form inner cover plate 60 is secured coaxially over the collar 58 by three spacer ribs 62.
  • the inner cover plate 60 has a dependent collar 64 which is spaced from but overlaps the first collar 58 vertically.
  • a locating stem 66 projects from the inner cover plate.
  • the arrangement of outer and inner cover plates 56,62 shields the interior of the tower completely from above but the space between the collars 58,64 provides a gas path to and from the interior.
  • vapour deposition vacuum chamber V indicated only in schematic outline in Fig. 10.
  • a turntable T On the floor of the chamber is a turntable T which is rotated by a motor drive (not shown) about a central vertical axis in the chamber.
  • a series of vertical spindles S project from the turntable to be rotated by a planetary drive (not shown) in the turntable as it rotates about its central axis.
  • equispaced towers are mounted on the spindles by the socketed spigots 48 of their base plates and they are positively located with their central axes parallel by a top plate 68 (shown in Fig. 10 only) which is positioned on a central pillar P of the turntable and on the locating stems 66 after the towers have been built up, engaging those stems in a manner which permits them to rotate freely.
  • the vapour deposition process which is typically performed at a temperature of 500°C under high vacuum, the towers are rotated continuously with the turntable.
  • Each tower is also rotated by the drives to the spindles on which they are mounted, so that each bank of drills is intermittently exposed to the plasma zones in the outer peripheral region of the chamber to assist the evenness and spread of coating of the exposed tips.
  • nitrogen is introduced into the chamber to reduce the vacuum and assist cooling.
  • the gas path between the spaced collars 58,64 the lids allows a convection flow through the interior of each tower so that the drill shanks are also cooled, the flow permeating the full height of the tower from the gaps at the drill flute recesses in the hollow walls.
  • the convection flow through the vented lid gives a more uniform cooling the process cycle time can thus be reduced, without risk of oxidation on the surface of the drill shanks when they are exposed to the surrounding air.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Drilling Tools (AREA)
  • Physical Vapour Deposition (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Turning (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Claims (8)

  1. Support (2) pour supporter une série de forets (D) dans une chambre de dépôt en phase vapeur (V) pour permettre le dépôt d'un revêtement céramique sur des régions des forets (D) s'étendant depuis leurs pointes, le support (2) comprenant au moins une paroi extérieure perforée (4) présentant une rangée d'ouvertures (6) dans lesquelles les forets (D) peuvent être insérés, caractérisé en ce que les forets (D) sont insérés, avec lesdites régions faisant saillie vers l'extérieur depuis le support (2), une paroi de support (8) dans l'intérieur creux du support (2) pour la ou chaque paroi extérieure perforée (4) parallèle à et espacée de la paroi extérieure (4) et présentant une rangée d'ouvertures correspondante pour localiser les forets insérés (D) avec leurs fûts sensiblement parallèles, un moyen formant butée (10) dans l'intérieur creux du support (2) espacé vers l'intérieur de la ou chaque paroi de support (8) pour localiser les pointes des forets (D) du même diamètre faisant saillie selon sensiblement la même étendue depuis la paroi extérieure (4), l'intérieur creux du support (2) et la localisation des forets (D) étant tel qu'une partie de chaque foret (D) vers l'intérieur de la paroi extérieure (4) est protégée de l'extérieur mais est exposée à l'atmosphère dans l'intérieur du support (2).
  2. Support (2) selon la revendication 1, où le moyen formant butée comprend une paroi arrière (10) dans l'intérieur du support (2) parallèle à ladite paroi extérieure (4) et à ladite paroi de support (8).
  3. Support (2) selon la revendication 1 ou la revendication 2, présentant une périphérie extérieure polygonale, ladite au moins une paroi extérieure (4) formant au moins une face de ladite périphérie.
  4. Support (2) selon la revendication 3 et comportant une périphérie extérieure hexagonale, des parois alternées (4) du support (2) étant perforées par une rangée d'ouvertures (6) dans lesquelles des forets (D) peuvent être insérés.
  5. Support (2) selon l'une des revendications précédentes, présentant un couvercle (52) protégeant l'intérieur creux depuis au-dessus, ledit couvercle (52) présentant un passage pour permettre l'écoulement de gaz entre l'intérieur et l'extérieur du support (2).
  6. Support (2) selon l'une des revendications précédentes, présentant un moyen (32, 34, 36) pour empiler sur le support (2) un deuxième support (2) ayant une configuration de paroi extérieure (4) correspondante.
  7. Support (2) selon la revendication 6, comportant des faces supérieure et inférieure (34, 36) destinées à venir en butée ensemble, par quoi deux supports correspondants (2, 2) peuvent être supportés l'un sur l'autre, et un rebord (32) faisant saillie sur ladite butée des faces (34, 36) pour réaliser une fermeture pour le joint entre les faces en butée.
  8. Procédé de revêtement par dépôt en phase vapeur des pointes d'une série de forets (D), où les forets (D) sont insérés dans un support creux (2) ayant une forme polygonale plane, les pointes à revêtir faisant saillie à partir d'au moins une face extérieure (4) de ladite forme polygonale, le support (2) avec les pointes insérées étant entraíné en rotation dans une chambre de dépôt à vide (D) pour permettre à chacune des pointes de foret de faire saillie du support (2) vers la périphérie de la chambre (V) pendant au moins une partie de la période de traitement, et un gaz admis dans la chambre (V) après le dépôt du revêtement pouvant circuler à travers l'intérieur creux du support (2).
EP00946099A 1999-07-14 2000-07-14 Procede et moyens de production de forets Expired - Lifetime EP1194609B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9916558 1999-07-14
GBGB9916558.1A GB9916558D0 (en) 1999-07-14 1999-07-14 Method and means for drill production
PCT/GB2000/002713 WO2001004375A1 (fr) 1999-07-14 2000-07-14 Procede et moyens de production de forets

Publications (2)

Publication Number Publication Date
EP1194609A1 EP1194609A1 (fr) 2002-04-10
EP1194609B1 true EP1194609B1 (fr) 2003-05-07

Family

ID=10857253

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00946099A Expired - Lifetime EP1194609B1 (fr) 1999-07-14 2000-07-14 Procede et moyens de production de forets

Country Status (10)

Country Link
US (1) US6866889B1 (fr)
EP (1) EP1194609B1 (fr)
JP (1) JP4454901B2 (fr)
CN (1) CN1265019C (fr)
AT (1) ATE239806T1 (fr)
AU (1) AU756360B2 (fr)
BR (1) BR0012402B1 (fr)
DE (1) DE60002579T2 (fr)
GB (1) GB9916558D0 (fr)
WO (1) WO2001004375A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0320144D0 (en) * 2003-08-28 2003-10-01 Dormer Tools Sheffield Ltd Universal jig
GB0320148D0 (en) * 2003-08-28 2003-10-01 Dormer Tools Sheffield Ltd Partially coated drill tool
DE10356679A1 (de) * 2003-11-28 2005-07-21 Rolls-Royce Deutschland Ltd & Co Kg Verfahren und Vorrichtung zur Beschichtung oder Wärmebehandlung von BLISK-Scheiben für Fluggasturbinen
KR101025323B1 (ko) * 2004-01-13 2011-03-29 가부시키가이샤 아루박 에칭 장치 및 에칭 방법
CN101550545B (zh) * 2009-04-30 2012-07-25 深圳市金洲精工科技股份有限公司 一种用于精密刀具金刚石涂层的刀柄插放装置及加工设备
US9586270B2 (en) * 2010-01-13 2017-03-07 Irwin Industrial Tool Company Coated hole cutter
DE102010056157A1 (de) * 2010-12-28 2012-06-28 Oerlikon Trading Ag, Trübbach Halterung für Bohrkopfbeschichtung
DE102013007454A1 (de) * 2013-05-02 2014-11-06 Oerlikon Trading Ag, Trübbach Vielseitige Haltevorrichtung zur Oberflächenbehandlung von stangenförmigen Substraten
DE102015105169A1 (de) * 2015-04-02 2016-10-06 Cemecon Ag Chargierung von Werkstücken in einer Beschichtungsanlage
US20210010128A1 (en) * 2018-03-29 2021-01-14 Oerlikon Surface Solutions Ag, Pfäffikon Device and method for selective vapor coating of a substrate
DE102019135183A1 (de) * 2019-12-19 2021-06-24 Oerlikon Surface Solutions Ag, Pfäffikon Haltesystem zum Halten von Substraten

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4528208A (en) * 1983-10-13 1985-07-09 Zymet, Inc. Method and apparatus for controlling article temperature during treatment in vacuum
DE3837487A1 (de) * 1988-11-04 1990-05-10 Leybold Ag Verfahren und vorrichtung zum aetzen von substraten mit einer magnetfeldunterstuetzten niederdruck-entladung
US5096736A (en) * 1990-08-07 1992-03-17 General Electric Company Cvd diamond for coating twist drills
US5489369A (en) * 1993-10-25 1996-02-06 Viratec Thin Films, Inc. Method and apparatus for thin film coating an article
US5961798A (en) * 1996-02-13 1999-10-05 Diamond Black Technologies, Inc. System and method for vacuum coating of articles having precise and reproducible positioning of articles

Also Published As

Publication number Publication date
JP2003504219A (ja) 2003-02-04
WO2001004375A1 (fr) 2001-01-18
CN1360642A (zh) 2002-07-24
US6866889B1 (en) 2005-03-15
EP1194609A1 (fr) 2002-04-10
ATE239806T1 (de) 2003-05-15
AU5998600A (en) 2001-01-30
DE60002579D1 (de) 2003-06-12
GB9916558D0 (en) 1999-09-15
DE60002579T2 (de) 2004-04-08
CN1265019C (zh) 2006-07-19
BR0012402A (pt) 2002-03-12
JP4454901B2 (ja) 2010-04-21
BR0012402B1 (pt) 2010-08-10
AU756360B2 (en) 2003-01-09

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